无需文本框即可在内部从条形码扫描仪获取输入 [英] Getting input from barcode scanner internally without textbox

问题描述

我有一个条形码扫描仪，在我的java应用程序中，当使用条形码扫描产品时，我必须带一个弹出窗口显示与数据库条形码相关的所有信息。我没有关于应用程序的文本框我必须在内部处理这个部分。我该怎么做呢 ？有什么建议吗？我正在使用swing for UI。

I have a barcode scanner and in my java application I have to bring a popup to display all the information associated with the barcode from database when the product is scanned using barcode. I have no textbox on the application I have to handle this part internally. How do I do this ? any suggestion ? I am using swing for UI.

编辑

条码扫描器是USB。如果我们扫描某些内容，它会将结果输出到具有焦点的文本框中。但我打开的页面上没有文本框。我可以使用一些隐藏的文本框并在那里读取值吗？

Barcode scanner is USB one. If we scan something it will output the result into the textbox which has focus. But I have no textbox working on the page opened. Can i work with some hidden textbox and read the value there ?

推荐答案

因为条形码扫描器只是一个发送密钥代码和ENTER的设备在读完每个条形码后，我会使用一个关键的监听器。

Since barcode scanner is just a device which sends keycodes and ENTER after reading of each barcode, I'd use a key listener.

final Frame frame = new Frame();
frame.setVisible(true);

frame.addKeyListener(new KeyAdapter() {

    @Override
    public void keyReleased(KeyEvent e) {
        if(e.getKeyCode() == KeyEvent.VK_ENTER) {
            // your code is scanned and you can access it using frame.getBarCode()
            // now clean the bar code so the next one can be read
            frame.setBarCode(new String());
        } else {
            // some character has been read, append it to your "barcode cache"
            frame.setBarCode(frame.getBarCode() + e.getKeyChar());
        }
    }

});

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